The Desert Springs Hydration Backpack by WFS comes with a leakproof 2-Liter hydration bladder in its main compartment, which is also designed with enough room for all the gear you want to keep handy. Adjust the shoulder, chest, and waist straps to get a perfect fit. It comes with a top front zipper quick-access pocket and 2 mesh side pockets for smaller quick access items.QUALITY MATERIALS: Made with durable polyester providing abrasion & water resistantanceVERSATILE: Main compartment features a 2L hydration bladder and enough space for your day hike gearPERFECT FIT: adjustable shoulder, chest and waist straps allows you to get the right fit for your hike, walk or bike tripCOMFORTABLE & BREATHABLE: Padded vented foam back panel and firm shoulder strap are encased in an anti-slip soft mesh to prevent sliding and movement when wearing and provides superior ventilation; sweat-resistant mesh helps keep you cool and dryCONVENIENT: Features a quick access pocket on top and 2 side mesh pockets